Touch display substrate, touch display apparatus having the same, pixel arrangement, and fabricating method thereof
The present application discloses a touch display substrate including an array of a plurality of pixels. Each pixel includes a first region and a second region in plan view of the touch display substrate. Each pixel includes a first electrode layer on a base substrate comprising a plurality of first electrode blocks in the first region, each of which corresponding to a subpixel; and a second electrode block in the second region; a first light emitting layer in the first region on a side of the plurality of first electrode blocks distal to the base substrate; a second light emitting layer in the second region on a side of the second electrode block distal to the base substrate; a second electrode layer in the first region on a side of the first light emitting layer distal to the plurality of first electrode blocks; and a touch electrode layer in the second region on a side of the second light emitting layer distal to the second electrode block; the touch electrode layer and the second electrode layer spaced apart and electrically insulated from each other.
1. A touch display substrate, comprising: an array of a plurality of pixels, each pixel having a first region and a second region in plan view of the touch display substrate, each pixel comprising:
a first electrode layer on a base substrate comprising a plurality of first electrode blocks in the first region, each of which corresponding to a subpixel; and a second electrode block in the second region;
a first light emitting layer in the first region on a side of the plurality of first electrode blocks distal to the base substrate;
a second light emitting layer in the second region on a side of the second electrode block distal to the base substrate;
a second electrode layer in the first region on a side of the first light emitting layer distal to the plurality of first electrode blocks; and
a touch electrode layer in the second region on a side of the second light emitting layer distal to the second electrode block; the touch electrode layer and the second electrode layer spaced apart and electrically insulated from each other;
wherein the second electrode block in the second region is electrically connected to the touch electrode layer through a conductive channel in the second light emitting layer;
the second electrode block is in direct contact with the second light emitting layer; and
the conductive channel is in direct contact with the second light emitting layer, the touch electrode layer, and the second electrode block.
2. The touch display substrate of claim 1 , wherein each pixel further comprises a pattern spacer layer on the base substrate dividing the pixel into the first region and the second region; the pattern spacer layer spacing apart and electrically insulating the touch electrode layer and the second electrode layer; and the pattern spacer layer spacing apart and electrically insulating the first light emitting layer and the second light emitting layer.
3. The touch display substrate of claim 1 , wherein the touch electrode layer is in a same layer as the second electrode layer, and the first light emitting layer is in a same layer as the second light emitting layer.
4. The touch display substrate of claim 1 , wherein each pixel comprises a subpixel of a first color, a subpixel of a second color, a subpixel of a third color in the first region, and at least three pixel compensation circuits in the second region.
5. The touch display substrate of claim 1 , wherein the conductive channel comprises a sintered conductive material comprising a light emitting material of the second light emitting layer, a conductive material of the second electrode block in the second region, and a conductive material of the touch electrode layer.
6. The touch display substrate of claim 1 , further comprising a plurality of electrode lead wires in the first region and a plurality of touch control lead wires in the second region; the plurality of touch control lead wires in a same layer as the plurality of electrode lead wires; the plurality of touch control lead wires electrically connected to the touch electrode layer through a conductive channel in the second light emitting layer, the conductive channel comprising a sintered conductive material comprising at least one of a light emitting material of the second light emitting layer, a conductive material of a touch control lead wire in the second region, and a conductive material of the touch electrode layer.
7. The touch display substrate of claim 1 , wherein each pixel further comprises a pixel compensation circuit in the second region.
8. The touch display substrate of claim 1 , wherein each pixel comprises a subpixel of a first color, a subpixel of a second color, a subpixel of a third color in the first region, a touch subpixel in the second region, the touch electrode layer is configured to operate in a time-division mode, the time-division mode comprising a display mode and a touch control mode, the touch electrode layer is a touch control electrode for conducting touch signals during the touch control mode, and one second electrode block in the second region and the touch electrode layer are electrodes for applying voltage signal to the second light emitting layer during display mode;
each pixel further comprises four pixel compensation circuits, each pixel compensation circuit is connected to one of the subpixel of the first color from a same pixel, the subpixel of the second color from a first adjacent pixel, the subpixel of the third color from a second adjacent pixel, and the touch subpixel.
9. The touch display substrate of claim 1 , wherein the first light emitting layer is an integral white light emitting layer; each pixel further comprises a plurality of color filters on a side of the second electrode layer distal to the first light emitting layer, each of which corresponding to a subpixel.
10. The touch display substrate of claim 1 , wherein the touch electrode layer is configured to operate in a time-division mode, the time-division mode comprising a display mode and a touch control mode, the touch electrode layer is a touch control electrode for conducting touch signals during the touch control mode, and one second electrode block in the second region and the touch electrode layer are electrodes for applying voltage signal to the second light emitting layer during display mode.
11. The touch display substrate of claim 1 , further comprising a plurality of thin film transistors on a p-silicon substrate, each of which corresponding to one first electrode block or one second electrode block.
12. The touch display substrate of claim 1 , wherein the first electrode layer is an anode layer, and the second electrode layer is a cathode layer;
an orthographic projection of the touch electrode layer on the base substrate is non-overlapping with an orthographic projection of any anode of any subpixel on the base substrate; and
the orthographic projection of the touch electrode layer on the base substrate at least partially overlaps with an orthographic projection of the second light emitting layer on the base substrate.
13. A touch display apparatus comprising a touch display substrate of claim 1 .
14. A method of fabricating a touch display substrate, comprising forming an array of a plurality of pixels, each pixel comprising a first region and a second region in plan view of the touch display substrate; wherein forming each pixel comprising:
forming a first electrode layer on a base substrate; forming the first electrode layer comprising forming a plurality of first electrode blocks in the first region, each of which corresponding to a subpixel; and forming a second electrode block in the second region;
forming a first light emitting layer in the first region on a side of the plurality of first electrode blocks distal to the base substrate;
forming a second light emitting layer in the second region on a side of the second electrode block distal to the base substrate;
forming a second electrode layer in the first region on a side of the first light emitting layer distal to the plurality of first electrode blocks;
forming a touch electrode layer in the second region on a side of the second light emitting layer distal to the second electrode block; the touch electrode layer and the second electrode layer spaced apart and electrically insulated from each other; and
electrically connecting one second electrode block in the second region to the touch electrode layer through a conductive channel in the second light emitting layer;
wherein the second electrode block is in direct contact with the second light emitting layer; and
the conductive channel is in direct contact with the second light emitting layer, the touch electrode layer, and the second electrode block.
15. The method of claim 14 , further comprising forming a pattern spacer layer on the base substrate dividing each pixel into the first region and the second region; the pattern spacer layer spacing apart and electrically insulating the touch electrode layer and the second electrode layer; and the pattern spacer layer spacing apart and electrically insulating the first light emitting layer and the second light emitting layer.
16. The method of claim 15 , wherein the pattern spacer layer is made of a photoresist material, forming each pixel comprising:
depositing a photoresist layer on the base substrate having the first electrode layer;
exposing the photoresist layer with a mask plate having a pattern corresponding to the pattern spacer layer thereby forming an exposed photoresist layer;
developing the exposed photoresist layer thereby forming the pattern spacer layer;
depositing an organic light emitting material layer on a side of the first electrode layer distal to the base substrate having the pattern spacer layer, thereby forming the first light emitting layer in the first region and the second light emitting layer in the second region; and
depositing an electrode material layer on a side of the organic light emitting material layer distal to the first electrode layer, thereby forming the second electrode layer in the first region and the touch electrode layer in the second region.
17. The method of claim 15 , wherein electrically connecting the one second electrode block in the second region to the touch electrode layer comprises sintering a portion of a multilayer structure comprising the one second electrode block in the second region, the second light emitting layer, and the touch electrode layer; and forming the conductive channel in the second light emitting layer, the conductive channel comprising a sintered conductive material comprising a light emitting material, a conductive material of the one second electrode block, and a conductive material of the touch electrode layer.
18. The method of claim 14 , further comprising forming a plurality of electrode lead wires in the first region and a plurality of touch control lead wires in the second region in a same layer; and
electrically connecting the plurality of touch control lead wires to the touch electrode layer through a conductive channel in the second light emitting layer;
wherein electrically connecting the plurality of touch control lead wires to the touch electrode layer comprises sintering a portion of a multilayer structure comprising a touch control lead wire in the second region, the second light emitting layer, and the touch electrode layer; and forming a conductive channel in the second light emitting layer, the conductive channel comprising a sintered conductive material comprising at least one of a light emitting material, a conductive material of the touch control lead wire, and a conductive material of the touch electrode layer.
19. The method of claim 14 , wherein the touch electrode layer is formed in a same layer as the second electrode layer, and the first light emitting layer is formed in a same layer as the second light emitting layer.
20. A method of operating a touch display apparatus comprising a touch display substrate in a time-division mode;
wherein the touch display substrate comprises an array of a plurality of pixels, each pixel having a first region and a second region in plan view of the touch display substrate, each pixel comprising:
a first electrode layer on a base substrate comprising a plurality of first electrode blocks in the first region, each of which corresponding to a subpixel; and a second electrode block in the second region;
a first light emitting layer in the first region on a side of the plurality of first electrode blocks distal to the base substrate;
a second light emitting layer in the second region on a side of the second electrode block distal to the base substrate;
a second electrode layer in the first region on a side of the first light emitting layer distal to the plurality of first electrode blocks; and
a touch electrode layer in the second region on a side of the second light emitting layer distal to the second electrode block; the touch electrode layer and the second electrode layer spaced apart and electrically insulated from each other;
wherein the second electrode block in the second region is electrically connected to the touch electrode layer through a conductive channel in the second light emitting layer;
the second electrode block is in direct contact with the second light emitting layer; and
the conductive channel is in direct contact with the second light emitting layer, the touch electrode layer, and the second electrode block;
wherein the time-division mode comprises a display mode and a touch control mode;
the method comprises:
in the touch control mode, transmitting touch signals through the touch electrode layer; and
in the display mode, applying voltage signal to the second light emitting layer through one second electrode block in the second region and the touch electrode layer.